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You just add up the length of all the sides. There are special formulae for special cases; for example in a square, you multiply the length of one side by 4 (since all 4 sides have the same length).

In the case of a circle, the perimeter is called "circumference", and it is calculated as 2 x radius x pi.

You just add up the length of all the sides. There are special formulae for special cases; for example in a square, you multiply the length of one side by 4 (since all 4 sides have the same length).

In the case of a circle, the perimeter is called "circumference", and it is calculated as 2 x radius x pi.

You just add up the length of all the sides. There are special formulae for special cases; for example in a square, you multiply the length of one side by 4 (since all 4 sides have the same length).

In the case of a circle, the perimeter is called "circumference", and it is calculated as 2 x radius x pi.

You just add up the length of all the sides. There are special formulae for special cases; for example in a square, you multiply the length of one side by 4 (since all 4 sides have the same length).

In the case of a circle, the perimeter is called "circumference", and it is calculated as 2 x radius x pi.

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14y ago
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14y ago

You just add up the length of all the sides. There are special formulae for special cases; for example in a square, you multiply the length of one side by 4 (since all 4 sides have the same length).

In the case of a circle, the perimeter is called "circumference", and it is calculated as 2 x radius x pi.

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Q: What is the fomula of a perimeter?
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